What are _ and _ respectively? Tell me how you calculated it.

1, let the baby count all that can be counted. Counting physical objects can help babies better understand numbers through personal experience. Therefore, the best choice for parents and babies to play math games is to let them count the real things in life, such as telephone poles or street lamps on the street. 2. When playing outdoors, count the number of trees and flowers on the roadside, pick the leaves on the roadside with the baby, and then observe the differences in size, shape and color of each leaf, and compare and classify them. 3. When eating fruits and snacks, divide the fruits into several portions, and tell the baby how many portions you have eaten and how many portions he has eaten, so that the baby can initially feel the concept of scores. 4. Get familiar with the order of numbers in the game with playing cards.

There are several kinds of numbers, and Arabic numerals are the most common one. Arabic numerals were not invented by Arabs, but by Indians. In fact, it should be listed as Hindi, but it spread to Arabia first and then to the world, so it is called "Arabic numerals".